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The Goodman 0130M00105 Defrost Thermostat is the genuine OEM temperature sensor that tells the ANZ130481AA heat pump's defrost board when to initiate and terminate a defrost cycle. Clamped to the outdoor coil, this bimetal switch closes when the coil drops to a preset frost temperature and opens once the coil warms, preventing ice buildup that would otherwise choke airflow and kill heating efficiency. A failed defrost thermostat is the leading cause of an outdoor coil freezing solid in winter.
This genuine OEM Goodman sensor is calibrated to the exact open/close set points your defrost board expects. Generic snap discs with the wrong temperature rating cause short-cycling, wasted defrosts, or missed defrosts and ice damage. For a low-cost part that governs winter performance, OEM is the smart choice.
Easy (2/5). With power off, unplug the old thermostat, unclip it from the coil tube, clamp the new one in the same location, and reconnect. No refrigerant work needed — an ideal DIY repair for a frozen coil.
Genuine Goodman quality at a budget-friendly price. Contact us to verify fit for your model and serial.